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The Case for Complex Dark Matter
- phaemon 11y agoNow that is interesting: the possibility of a whole new type of reality built of Dark Matter!
- thechao 11y agoOr, three or four or eight different dark matters (one of which is our stuff), that all only weakly interact with each other through gravity. Or, even more strangely, one of those dark matter's interacts with stuff that doesn't even interact with the gravitational field. A graph of weakly-connected physics.
- geon 11y agoMaybe a directional graph?
- trhway 11y agoi feel at least half-vindicated :) https://news.ycombinator.com/item?id=10049619 https://news.ycombinator.com/item?id=10049619
- yk 11y agoI really like the idea of complex dark matter, because there be dragons.
- caribeb 11y agoDark matter is mind blowing. I love Neil Degrasse Tyson's analogy of dark matter being the ocean at night and what we see is only the crests of the waves.
- sombremesa 11y agoThat's...not a good analogy. I guess it's poetry of some kind, but it doesn't really correspond in a technical sense to what dark matter is.
- vectorjohn 11y agoThere is probably a really obvious disproof of this, but I thought of what might be an interesting concept to explore in a sci-fi story. When they mentioned that there could be a whole other class of particles rather than one type of dark matter, it made me think what if dark matter is just an adjacent universe and for whatever reason gravity can interact between universes. So it would make sense if galaxies in neighbor universes tended towards places in our universe with high gravity, i.e. our galaxies. Especially if both universes started at around the same time. But then I guess that would probably mess up orbits of smaller things. Although space is big so maybe not. Just a thought.
- andrewflnr 11y agoReminds me a bit of https://en.wikipedia.org/wiki/Brane_cosmology https://en.wikipedia.org/wiki/Brane_cosmology . Not so easily disprovable, so far. :)
- colomon 11y agoIf dark matter has 80% of the mass, and your imagined adjacent universe is otherwise like ours, then it seems like you need four of them to make it work. :)